The “png_inflate()” function in pngrutil.c contains and out of
bounds error (CVE-2011-3045).

The “png_set_text_2()” function in pngset.c contains an error
which could result in memory corruption (CVE-2011-3048).

The “png_formatted_warning()” function in pngerror.c contains an
off-by-one error (CVE-2011-3464).

Impact

An attacker could exploit these vulnerabilities to execute arbitrary
code with the permissions of the user running the vulnerable program,
which could be the root user, or to cause programs linked against the
library to crash.